Cited by 39Monoclonal and Polyclonal Antibodies ResearchProtein Structure and Dynamicsvaccines and immunoinformatics approaches

Computational design of an epitope-specific Keap1 binding antibody using hotspot residues grafting and CDR loop swapping

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Liu, Xiaofeng, Taylor, Richard D., Griffin, Laura, Coker, Shu-Fen, Adams, Ralph, Ceska, Tom, Shi, Jiye, Lawson, Alastair D. G. +1 more·2017·Scientific Reports

Abstract

Abstract Therapeutic and diagnostic applications of monoclonal antibodies often require careful selection of binders that recognize specific epitopes on the target molecule to exert a desired modulation of biological function. Here we present a proof-of-concept application for the rational design of an epitope-specific antibody binding with the target protein Keap1, by grafting pre-defined structural interaction patterns from the native binding partner protein, Nrf2, onto geometrically matched positions of a set of antibody scaffolds. The designed antibodies bind to Keap1 and block the Keap1-Nrf2 interaction in an epitope-specific way. One resulting antibody is further optimised to achieve low-nanomolar binding affinity by in silico redesign of the CDRH3 sequences. An X-ray co-crystal structure of one resulting design reveals that the actual binding orientation and interface with Keap1 is very close to the design model, despite an unexpected CDRH3 tilt and V H /V L interface deviation, which indicates that the modelling precision may be improved by taking into account simultaneous CDR loops conformation and V H /V L orientation optimisation upon antibody sequence change. Our study confirms that, given a pre-existing crystal structure of the target protein-protein interaction, hotspots grafting with CDR loop swapping is an attractive route to the rational design of an antibody targeting a pre-selected epitope.

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  • Established structural bioinformatics methods such as homology modelling, protein-protein docking or protein interface prediction are already used for rational antibody design.

    “Established structural bioinformatics methods such as homology modelling [6, 7], protein–protein docking [8, 9] or protein interface prediction [10] are already used for rational antibody design [11–13].”
  • Liu and co-workers validated an approach in which binding site motifs from existing protein-protein complexes were transferred directly onto an antibody in a process termed 'hot-spot grafting'.

    “In contrast, Liu and co-workers validated an approach in which binding site motifs from existing protein–protein complexes were transferred directly onto an antibody in a process termed ‘hot-spot grafting’ [11].”

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Authors
Liu, X., Taylor, R. D., Griffin, L., Coker, S.-F., Adams, R., Ceska, T., Shi, J., Lawson, A. D. G., & Baker, T.
Affiliations
  • UCB Pharma (United Kingdom) (GB)
  • UCB Pharma (Belgium) (BE)
Corresponding author
  • Liu, Xiaofeng
  • Baker, Terry
Venue
Scientific Reports
Published
2017-01-27
Volume
7
Issue
1
Pages
41306-41306
ISSN
2045-2322 (ISSN-L)
OpenAlex
W2582870217
Cited by
39
References
72
Citations by year
2026: 3 · 2025: 6 · 2024: 6 · 2023: 2 · 2022: 6 · 2021: 1 · 2020: 4 · 2019: 4 · 2018: 6 · 2017: 1
FWCI
3.15
Type
journal article
Language
en
Open access
Locations
  • Scientific Reports (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Radiology, Nuclear Medicine and Imaging › Monoclonal and Polyclonal Antibodies Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Structure and Dynamics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › vaccines and immunoinformatics approaches
Keywords
Keap1, Nrf2, Keap1-Nrf2 interaction, hot spot residues, antibody scaffolds, protein-protein interaction inhibition, co-crystal structure, rational antibody design
MeSH terms
Kelch-Like ECH-Associated Protein 1, Amino Acid Sequence, Antibodies, Monoclonal, Antibody Affinity, Epitopes, Computer Simulation, Humans, Protein Binding, Crystallography, X-Ray, Complementarity Determining Regions, NF-E2-Related Factor 2

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